Seiko Cal. 6657 - 593

The Seiko 6657-593 represents an important milestone in Seiko's 1977 lineup. Powered by the 6657 caliber with 34j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-4416f5cd093a]

Also known as: World Timer

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

43mm

Case Thickness

10.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Silver

Jewels

34j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1977

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